Awesome ! then it's probably worth the extra time you need to spend on Mac because of constant changing.
I think maybe release the Mac version in Dec then let the Win users now be the ones to wait smile
Unless you have that cross platform one planned ?
If they both used m4a and aiff it should not be an issue as I said Biab only needs to read the source files and renders to a standard format.
On the Mac I can convert the RT to 24bit 48khz and Biab is still able to use them, don't know if it still goes into memory @ that ?